diff --git a/common/src/main/java/io/netty/util/internal/StringUtil.java b/common/src/main/java/io/netty/util/internal/StringUtil.java
index e40d08bce6..2efa28e9d2 100644
--- a/common/src/main/java/io/netty/util/internal/StringUtil.java
+++ b/common/src/main/java/io/netty/util/internal/StringUtil.java
@@ -17,10 +17,9 @@ package io.netty.util.internal;
 
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Formatter;
 import java.util.List;
 
-import static io.netty.util.internal.ObjectUtil.checkNotNull;
+import static io.netty.util.internal.ObjectUtil.*;
 
 /**
  * String utility class.
@@ -28,7 +27,7 @@ import static io.netty.util.internal.ObjectUtil.checkNotNull;
 public final class StringUtil {
 
     public static final String EMPTY_STRING = "";
-    public static final String NEWLINE;
+    public static final String NEWLINE = System.getProperty("line.separator");
 
     public static final char DOUBLE_QUOTE = '\"';
     public static final char COMMA = ',';
@@ -47,47 +46,28 @@ public final class StringUtil {
     private static final char PACKAGE_SEPARATOR_CHAR = '.';
 
     static {
-        // Determine the newline character of the current platform.
-        String newLine;
-
-        Formatter formatter = new Formatter();
-        try {
-            newLine = formatter.format("%n").toString();
-        } catch (Exception e) {
-            // Should not reach here, but just in case.
-            newLine = "\n";
-        } finally {
-            formatter.close();
-        }
-
-        NEWLINE = newLine;
-
         // Generate the lookup table that converts a byte into a 2-digit hexadecimal integer.
         int i;
         for (i = 0; i < 10; i ++) {
-            StringBuilder buf = new StringBuilder(2);
-            buf.append('0');
-            buf.append(i);
-            BYTE2HEX_PAD[i] = buf.toString();
+            BYTE2HEX_PAD[i] = "0" + i;
             BYTE2HEX_NOPAD[i] = String.valueOf(i);
         }
         for (; i < 16; i ++) {
-            StringBuilder buf = new StringBuilder(2);
             char c = (char) ('a' + i - 10);
-            buf.append('0');
-            buf.append(c);
-            BYTE2HEX_PAD[i] = buf.toString();
+            BYTE2HEX_PAD[i] = "0" + c;
             BYTE2HEX_NOPAD[i] = String.valueOf(c);
         }
         for (; i < BYTE2HEX_PAD.length; i ++) {
-            StringBuilder buf = new StringBuilder(2);
-            buf.append(Integer.toHexString(i));
-            String str = buf.toString();
+            String str = Integer.toHexString(i);
             BYTE2HEX_PAD[i] = str;
             BYTE2HEX_NOPAD[i] = str;
         }
     }
 
+    private StringUtil() {
+        // Unused.
+    }
+
     /**
      * Splits the specified {@link String} with the specified delimiter.  This operation is a simplified and optimized
      * version of {@link String#split(String)}.
@@ -559,8 +539,4 @@ public final class StringUtil {
         int len = s.length();
         return len > 0 && s.charAt(len - 1) == c;
     }
-
-    private StringUtil() {
-        // Unused.
-    }
 }